Airlines will be ordered to hand out health warnings with tickets for long-haul flights as the Government acts to end the scandal of deaths and injuries caused by deep vein thrombosis (DVT), also known as 'economy class syndrome'.

It was supposed to be unsinkable. It could even withstand a direct hit from a torpedo attack. The Kursk was a leviathan with an almost mythical reputation as a war machine. This gargantuan nuclear submarine, the size of two jumbo jets, was the pride of the Russian navy.